Radio appliance



March 19 1929. w, DuBiLiER '1,705,559`

mmm Annunci Filed nec., 15;, 1924 2 sheets-sheet :Iz-:EL

March 19, 1929. w DUBMER 1,705,559

RADIO APHJIACE Filed D60. '15, 1924 2 Sheets-Sheet 2 INVENTOR Mum/w JDa/UH? Patented Mar. 19, 1929.

UNITED STATES PATENT OFFICE.

WILLIAM DUBILIEB, OF NEW ROCHELLE, NEW YORK, ASBIGNOB T DUBUIEB CON- DENSEB CORPORATION, OF NEW YORK, N. Y., .A CORPORATION OF DmWABE.

RADIO APPLIANCE.

Application led December 15, 1924. Serial No. 756,081.

My invention relates to improvements in radio appliances; and particularly to a device for uniting in a single self contained structure at least two of the electrical units that are4 employed with radio apparatus now in general use; with the result that a suitable saving of space is eifected, and the conductors that unite the parts of radio apparatus can be disposed to better advantage.

The nature and objects of the invention are fully set forth in the following description taken with the accompan ing drawings upon which. two or more pre erred embodimentsV of the principle `of my invention are illustrated. I do not, however, wish to beliinited to the exact constructions shown herein, as I may vary the details within the limits delined by the broad and general meanings of the terms of the appended claims On the drawings,

Figure 1 is a vertical sectional view of a construction'according to the principle of my invention;

Figure 2 is a similar sectional view of another form of my invention;

Figure 3 is an upper end or top plan view of part of the construction appearing in Figure 1; and

Figure 4 is a sectional view taken on the line 4-4 of Figure 2 looking upward, as indicated by the points of the arrows.

l The same numerals identity the same parts throu hout.

Re erring first to Figure 1, I show at 1 a base of some suitable substance such as insulation, havin al central bore or passage 2 throu h it; die base being provided at its loweren with a llange 3 upon which it may rest and be' conveniently secured in position.

This base also serves as a support for a housinglsleeve or socket 4 having a bore or passage 5 t rough it from end to end, with an internal rib 6' providing a shoulder 7 to be engaged by the end of a thermionic valve or vacuum tube 8. This tube may be of the usual type comprising an evacuated vessel of glass, the extremity of which is encircled by a band or ferrule 9 which can be inserted into the upper end of the sleeve or socket 1 and rest upon the shoulder 7 This shoulder or abutment prevents distortion of the contact springs 15 in the event that the tube 8 is carelessly inserted. The tube 8 will contain the plate, grid and lilament ordinarily present in such units, and the three electrodes named will be united to conductors which pass through the end of the tube and are joined to the outside pillars or Contact studs P and G which will be united to the plate and grid respectively, and two additional pillars or Contact studs F and F- which will be connected to the two opposite terminals of the filament.

Enclosed by the housing sleeve 4 below the internal rib 6 will be a pair of windings 10 and 11 constituting the'primary and secondary respectively of a transformer. These windin may be embedded in wax 12 or some other suitable substance, and the bottom or lower end of the socket 4, within the su port or base l, may be provided with a shoulder 13 to receive a cover 14 removably held in place in any suitable manner.

To enable the tube to be connected in the circuit of the radio apparatus which, for example, may be a Well-known radio receiving set, I attach to the inside of the sleeve 4, a number of spring contacts 15 to co-operate with the contacts of the tube 8. The basel and sleeve 4 may have any desired cross-sectional shape, but as indicated in Figure 3, the sleeve 4 1s cylindrical; and the contacts 15 will preferably be in'the form of leaf sprin secured against the surface ofthe bore selow the rib 6 and having portions which project toward the center in position to press a ainst the ends of the Contact studs F-lan F, G and P. This feature is indicated inFigure 3 which shows the socket in top lan with the tube removed, the position o the contact studs at the bottom of the tube en aging the spring contacts 15, bein indicated in dotted lines 1n Figure 3. Eac of the leaf springs 15 is made fast to a contact segment 16v secured upon the outside of the sleeve 4, these segments being of conductive material preferably spaced equi-distantly apart and to some extent embedded in the material of which the socket 4 is composed. The springs 15 and socket 16 may be united by screws 17 and to enable the base 1 to receive the socket, the upper end of the bore 2 may be enlarged, if desired, as shown at 18 to provide a shoulder 19. Then when the socket 4 is inserted into the upper end of the base 1, the projecting segments 16 will rest upon the sho der 19. Instead of enlarging the upper end of the bore 2 all the way around the circumference thereof, I may cut slots into the walls of this conductors.

Y, may

*in the sides of the base l to receive threaded screws 20 which can be turned in to press against the segments 16, and held tight by binding nuts 21. The tube 8 may have the shell or band 9 provided with a projection not shown, to engage a bayonet slot in the upper endofthe socket 4, this bayonet slot beingfalso'not shown, as it is quite familiar to those skilled in the art, and almost every tube v is provided with such means to enable it to be heldin the socket receiving it. When the tubeis inserted into the upper end of the socket 4 and caused to abut the shoulder 7, it is made toassume such position that each of its'four contact studs engages one of the leaf springs 15, and the socket 4 is secured against movement in the base 1 by the engagement of the screws or bolts 20 with the segments or contacts 1 6. Any suitable means be provided Yto'enable connection to be made` through the base 1 and through the socket4 with the terminals of the transformer windings 10 and 11. I illustrate connections for the transformer windings fully in Figures 3 and 4 'which are presently to be described. The advantage of a device o f thissort combining in a singlel structure both a vacuum tube and a transformer is that with radio receiving sets utilizing one or more sta es of amplification, the vacuum tube amplier and the amplifying transformer can be housed to ing a`y good ether in a single structure saveal of space, and enabling the Y conductors which unite the various parts of4 the set to be disposed to'much greater'advantage andl with more convenience, inside of the casing or cabinetbwhich encloses the radio receiving set.

Figures 2 and 4 illustrate the principle of my invention as practiced with a base or support Only, enabling me to dispense with the socket 4.` The base is indicated atY-22fwith a chamber 23 therein and having a ange 24 at its lower end. From the top 25 of the base extends a neck 26 having a passage 5a therethrough to communicate with the chamber 23, this passage containing a shoulder 27 similar to the shoulder 7, so that the vacuum tube 8 can rest upon it. Through the sides of the base pass screws 28 constituting binding posts carrying nuts 29 to hold the screws in place and secure thereto the extremities of electrical The heads of these` screws are on the inside of the compartment 23 and they serve to hold in place leaf springs 30 providing contacts similar to the leaf springs 15 above-mentioned for the contact studs of the tube 8. Within the compartment 23 are transformer windings 16 and 11 as before, em-

seventh or remaining binding post 28. As `is understood when an amplifying transformer is employed in a radio receiving set, between two vacuum tubes, the primary of the transformer. 'is connected in the' outputy circuit of the one tube, and the secondary is joined to the input circuit of the other. Hence, in connecting one terminal of the secondary winding 11 to one of the spring contacts 30, it is desirable to select the spring 30 which will ordinarily be in circuit with the grid of the tube 8, the connections of an amplifying radio receiving set being made in this way. The

other terminal of the secondary 11l maybe-- united to the binding post to which is aiixedl the spring 30 which will engage with the stud leading to the negative terminal of the lilament, and for this purpose, I may employ a conducting strip 31 having recesses 32 in its ends, this strip being curved to lit against the side of the base 22, the notches receivin 'the screws or contacts 28, and the nuts 29 hoding the conductor'strip'in place. This conductor strip may be discarded in case it is not desired to connect the other terminal ofthe secondary directly to the negative end of the filament in the tube 8. The-u per end of the neck 26 may have-an L-shape or bayonet slot 33 therein,.and the bandl 9 of the tube 8 may have a pin 34 to engage this slot, the same'as described above in connection with the form of my invention of Figures 1 and 3. y

The device shown in Figures 3 and 4 enables a vacuum tube 'and a transformer for amplifying or for any other purpose, to be connected very conveniently in the circuit ofA a radio receivin set, and the necessity for settmg up the tu at one point in the radio set, and the transformer at another point is obviated. lIn view of the fact that practically .all sets have several stages of amplification,

the merit of the invention can be appreciated, because the ordinary radio receivin set generally presents to the eye ofthe o server, a maze or network of connectors, with the transformers, the tubes and the other parts grouped togetheras closely as possible, so

that the assembling of such a. set is Very diiiicult, not only because of the need for putting the various appliances each in its own separate position, but also because the various connections must be properly made. With this invention, the work of assembling a receiving' 2, for example, the support 1 by itself constitutes the member for housing the transformer and providing the socket for the tube 8.

In the device shown in Figure 2, I may also employ a partition above the transformer, the wax 12 being confined between this partition andthe closure 14, leaving a space in the upper part of this member 1 for the spring terminals 30 and providing room for the movement of these terminals as required when the tube is inserted in the socket 26.

It is of course to be understood that my invention is not limited to the inclusion in the members 1 and 4 of a transformer for amplifying only, butcovers in the combination specified, a transformer for any purpose required.

Having described my invention, what I believe to be new and desire to secure and protect by Letters Patent of the United States 1s:-

1. The combination of a base, a housing sleeve in said base, one end of said housing sleeve adapted to provide a socket for a vacuum tube and the other end to receive a transformer, a closure for the transformer carried kby said sleeve, spring contacts in said sleeve to engage the terminals of the tube, contact segments on the outside of said sleeve connected to said spring terminals, and binding screws mounted in the base to engage said segments and hold the sleeve in position.

2. A member in the form of a base having a chamber therein, and a socket projecting :from the top thereof to receive a vacuum tube,-

spring terminals in said chamber to -engage the terminals of the tube, binding screws holding said terminals in place and projecting to the outside of said member, a transformer in said chamber and binding screws projecting to the outside of said member to connect with the terminals of the transformer, together with a connecting strip to unite lone of the binding screws for the transformer to one of the binding screws for the vspring terminals, to connect with the vacuum tube.

Signed at New York in the county of New York and State of New York this 13th day of December, A. D. 1924.

yWILLIAM DUBILIER. 

